Multispindle grinding-machine.



W. LE R. BRYANT. MULTISPINDLE 'GRINDING MADHINE.

T.. N A Y R B um E L W MULTISPINDLE GRINDING MACHINE.

APPLICATION FILED 00T.21,1909.

Patented Feb. 14, 1911.

16 SHEETS-SHEET 3.

W. LE R. BRYANT.

MULTSPINDLB @BINDING MACHINE. l

APPLICATION PILPD o 1T.21,111o9. 983,975, Patented Feb. 14, 1911.

` 16 SHEETS-SHEET 4.

l Y f .h N TL H 'C TA NM ATG. Bm lun RG En LD N .I w@ D I T L `U .M

APPLICATION ILBD OGTQZI, 1909.

Patented Feb.14.19,11.

1G SHEETS-SHEET 5.

' dwf/mentar" Il. figa/ W. LHR.l BRYANT.

MULTISPINDLB GRINDING MAOHINB APPLIGATIUN FILED 001221, 1909. 983,975. Patented Feb. 14 1911.

w. Le R. BRYANT. MULTISPINDLE GRINDING MACHINE.

APPLIOATION FILED 00T.21, 1909.

' Patented Feb. 14, 1911.

W. LB R. BRYANT. MULTISPINDB GRINDING MAGHINE.

APPLIUATION FILED QUT. 21. 1909.

983,975.` y kmanned Feb.14,14911.

16 SHEETS-SHEET 8.

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R N I H .m Tl wm `mm .R RG `um N .m Ws I T L U M APPLICATION IILB) 0UT.21,1909.

Patented Feb. 14, 1911.

16 SHEETS-SHEET 9.

, I @ana/wwf 2l, la Z377 Q22 E# W. LE R. BRYANT. MULTISPINDLE GRINDING MACHINE.

APPLICATION FILED 001.21, 1909.

Patented Feb. 14,1911.

Y 16 SHEETS-SHEET 10,

11.6.9 I; fm

W. LB R. BRYANT.

MULTISPINDLB GRINDING MAGHINE.

APPLIGATION FILED 0GT.21, 1909.

Patented Feb. 14, 1911.

16 SHEETS-SHEET l1.'

nl. J IL f. a. n

W. LBZR. BRYANT. MULTISPINDLE GRINDING MACHINE.

APPLICATION FILED 0OT.Z1,1909. l

Patented Feb. 14, 1911.

16 SHEETS-SHEET 12.

W. LB R. BRYANT.

MULTISPINDLE GRINDING MACHINE.

APPLIUATION FILED 001221.1909.

vPreenied Feb. 14, 1911.

, 16 SHEETS-SHEET 13.

. 297 l 6o 5 fr gag y a I I l l mh N An Y R B R. E L W MULTISPINDLB GRINDING MACHINE.

APPLICATION FILED 00T.21,1909,

Patented Feb. 14, 1911.

16 SHEETS-SHEET 14.

W. LE R. BRYANT.

MULTISPINDLE GRINDING MACHINE.

APPLICATION FILED 00T.21,19o9. 983,975. Patented Feb. 14, 1911. i 1s SHEETS-SHEET 15.

f... W@ @a U,

W. LEv R. BRYANT.

MULTISPINDLB GRINDING MACHINE.

1 APPLICATION FILED 001.21, 1909.

Patented 1111111911.

16 SHEETS-SHEET 16.

WILLIAM LE ROY BRYANT, OF SPRINGFIELD, VERMONT.

MULTISPINDLE GRINDING-MAGHINE.

UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented Feb. 14, 1911.

This invention has relation to multispindle grinding machines of the general characterA of that illustrated and described in Letters Patent No. 925,867, granted to me June 22, 1909.

The general object of the invention is to produce a practical machine capable of operating upon work formed of either hard or relatively soft metal, -for the purpose of' removing the surplus metal by abrasion instead ,of byy cutting, and of leaving a lne. `finish on the surface of the work.

Moreparticularly the 'obj ect of the present invention is to provide certain improvements on the, machine shown in the patent referred to, by which it is simplified in construction, and rendered more eificient and accurate in operation. For instance I dispense with the rotation of the tool support, and vthus am able to use a slidingcarriage `in which the tool spindles are journaledh'thereby simpliying the tool slide and the parts connected therewith.

y In order to secure a cross feed, however, Which inthe previous machine was accomplished by the rotation of the turret, I employ .mechanism for moving the work holder transversely with reference t0 the axes of the tool spindles. lThis is in addition' to the manually-operated means by i Lwhich the .Work carriage or support may be oved v by hand to properly` position the 'u apk with reference to the particular too'l Vwhi h y climi ation of the rotatory support for the Vtool s indles, Iam able to secure a greater is to operate' thereupon. .By the stability and rigidity of construction and at the same time` secure a greater eiiiciencyV of the mechanism by which the tool spindles' are rotated. In addition to the improvements WhichI havethusbriey noted, the present invention includes a number of others, lall ofi which are illustrated upon the drawings, described in the followingspecifi- 4 cation, and pointed -ou`t inthe 'appended claims.

Referring to the accompanying drawings,

which illustrate one embodiment of the 1nvention, to the details of construction of which the invention fis not limited how-4 ever,-Figure 1 represents in plan View my improved multi-spindle metal Workin machine. Fig. 2 represents a front elevation of the same. l Fig. 3 represents the right end elevation of the machine. Fig. 4 represents the left end elevation of the machine. Fig. 5 representsg a section on the lineV of Fig. 9, looking in the direction of the arrow. Fig. G represents a longitudinal section onV the line (5I-6 of Fig. 3. Fig. 7 represents a vertical transverse section on the line 7 7 of Fig. 5. Fig. 8' represents a section on the line 8 8 of Fig. 6, and illustrates the i means for driving the work holder. Fig. 9 illustrates in sec-tion. a portion'o'f the table or slide on which the work carriage is mounted and illustrates stops used for, limit- 'ing the movement of the slide or table.' Fig. 1.0 is a detail view illustrating one of the Ystops or abutments shown in the last-mentioned ligure. Fig. 11 represents a section Von the line ll-ll of F ig. 5,`and illustrates the powerstransmitting mechanism for/rotating the tool spindles. Fig'. 12 isa fragmentary view partially iir'section on theline `l2*12 of Fig. 11, and illustrates the main driving shaft, the drumthereonfor imparting movement to the belts which-drive the work spindies, and the frame in `which the main driving shaftis jo'l'irnaled.` Fig. 13 is adetail view of a portion of a power transmitting mechanism located J`in? the bed of the machine and illustrates the nlutch and theclut'ch-operating mechanism. `Figs. 14: and 1,5 are fragmentary' views illustrating means employed for effecting a quick actua ,tiony of the clutch.' Fig. 16 represents a slightmodication of the cam which controls AXthe. cross `feed 'of Vthe Work support.-

-Fig 17 isa more-.complete'view of the mechanism shownl in Fig. 13, giving a` plan Vview of the clutch-shifting mechanism and .a

portion of the power-transmitting mechanism whichelfects the actuation ofthe crossfeeding" mechanism for the -work holder. JFi 18 illustrates the. yokel lever Vwhich, shifts the clutch shownin Fig'. '17." -Fig. 19 illustrates the lever by which' power is im-4 parted tothe clutch-shifting lever.v Fig. 2 0 represents a partialf-side'elevation 'and apartial section on the line QOQQOoFi'g.' 30,v -V

and illustrates in-part the means. employed forlocking the'slee'ves, bolsters or quillsV of -1 the work spindles after the'yliave been vati-- i Fig. es. rig.

' mechanism.

. which I have selected as best embodying my 'which I have adopted is for the purpose of justed in proper position with reference to the worlr. Fig. 21 illustrates in front elevation the clutch land power-transmitting mechanisms shown in Fig. 17. Fig. 22 represents a right end elevation of the same. Fig.23 represents in plan view a portion of the work-supporting mechanism, and illustrates the cross-feeding mechanism for the work support. Fig. 24.- rrepresents a vfront elevation of the same. Fig. 25 represents a transverse section through' a portion of the machine to illustrate the cross-feeding In this view, most of the parts are shown as theyappear in elevation. -.Fig. 26 represents a section on the line 26-26 of 27 represents avse'ction on the liney 27-27 of Fig. 25, and illustrates the feed nut for the 'worlr support. Fig. 28 illustrates the feed nut shown in Fig. 27. Fig. 29 represents in plan view a portion of the tool slide. Fig. 30 representsa section on the line Of-3601L Fig. 29. Figl illustrates one of the tool spindles and the quill, sleeve or bolster in which it is mounted. Fig. 32 illustrates av section on the line E32- 32 of F ig.'31. 3B represents a section l on the line .3S-33 of Fig. 31. Fig.A 34C is a small detail view, being a section o n the line 20 -20 of Fig. 3, and shows a portion of the power-transmitting mechanism for the tool spindles. Fig. 35 illustrates in front eleva-v tion an attachment for -one of the spindlesy for the purpose of securing an additional feed or adjustment of a tool, preferably a vertical adjustment, in consequence of which the tool may be employed for grinding 'internal curved surfaces as for instance ball. races etc. :Figa 36 illustrates a plan view of the same. Fig. 37 represents a vertical longitudinal section through the same `on the line 37--37 of Fig. 38. Fig. 38 represents an end elevation ofthe attachment and is a projection from- Fig. 37 and Fig. 36. Fig. 39 represents a section on the lline 39-39 of Fig. 37. Fig. @represents asectionon the line 40.40 of Fig. 37. Fig. 41 shows in plan Aview liow .the grinding tool. may utilized for grinding internal curved sur\ faces of varying radii. Figs. 42 and 4?)- i represent views illustrating the work vin diderent positions with reference to vthe grinding tool.

Before proceeding 'to describe the machine invention, I desire to have it understood that the machine is not'the only embodimenttowhich the invention is capable, that a wide .range of equivalents may be `employed for the parts which I have illustrated vand will hereinafter describe, that .the phraseology' description and not of limitation except where the sensel absolutely requires. it, vthat the-'parts will be of the necessary usize and relationship and properly mounted and supthe carriage.

' of the, tool spindle,

ported according to the tenets of machine construction, and that many of the parts are conventionally shown. y

The machine as a whole comprises a bed upon which the tool slide is mounted on ways so as to be 'movable longitudinally of i the bed for effecting the length feeds of lthe tool. The tools, which consist-of grinding wheels of different. sizes, shapes and abrading qualities, are mounted upon. extensible spindles which are journaled in sleeves, bolsters or supports supported in the tool slide. ly means of suitable power-transmitting mechanism which may be operated by hand, the tool, which is selected for operation upon the work, may be advanced beyondthe others so as tobri-ng itinto proper relation to thc Work, after which the tool will be fed lengthwise by the slide-feeding mechanism. Ihc tool spindles are driven by suitable powertransmitting mechanism, which in the present machine Atakes the form of av driving drum and belts which engage pulleys on the Each spindle is equipped with a fast and loose pulley, and, by the aid of beltshifting mechanism, any one of the tool spindles maybe selected for rotation, thc others remaining in a state of rest or non- 'rotation The work support or holder takes the form 'of a chuck and chuck spindle which is mounted in a carriage, and mechanism is provided for effecting transverse feeds of spin dles.

supported upon a slide which is movable in a direction at right angles to the vpath of movement of the carriage, 1n consequence of The carriage itself is slidingly which the carriage is movable both longitudinally and transversely of the machine. In addition thereto, the' slide is mounted upon a. head vwhich has a pivotal connection with 'the bed so as to swing around a vertical axis, in consequence of which thework spindie maybe arranged at an angle 't the vaxis 'the tool of which'is operating upon the work. In consequence of this universal adjustability of the work support in horizontal directions, the cross-feeding ilo mechanism for thework carriage is connected to=the power-transmitting devices on the bed by universal joints connectionsso that the cross feed ofV the carriage may take place regardless of the ositio'nA in which rthe carriage is located. he mechanism for feeding the tool slide is.' `actuated from the main driving shaft, and". the cross feed mechanism forV the work carriage is connected to orctuated by the tool-slide-eontrol-j ling mec anism, though means are. provided .for automatically controlling the cross feed mechanism andsecuring a differential cr'oss l feed. Proceeding@ tion of the mtachine', the bed may be o'f `any suitable size and shape. It is indicated 'aft'50 and is'i'llustrated as being ofthe box'type 1 now to the' details' of-descrip- Lio ,iiisni therein contained to with front rear and end walls. "It is shown as being provided with a vertical front to' rear partition 51 which` provides two compartments 52, 53 for the reception of power'- transmitting mechanism. w In thefront of the bed `there is a large opening into the compartment 53 which is normally closed by a removable door or plate 54C which, as will' be explained, supports certain of the power transmitting mechanisms. In the rear ver# `.tical walloi" the bed there are also 'two large vapertures communicating respectively with the compartments 52 and` 53, which saidl apertures are normally closed by removable doors or plates 55 '56.` The latter doors are `provided with manually-operated locks as indicated at 57. By theprovision of these various removable doors, access is easily had tothe interior of the bed'and tothe mechaclean, oil and repair it, The compartment 52 may serve with convenience as a i'eceptacle forwaterwhich is used inthe grindingoperation and from `which the water may be pumped by any suitable -means not shown.

On the upper ipart of the bed are guideways or shears upon which rests a tool slide or tool carriage `which is indicated as a whole at 58. Like the bed, the frame of the` tool slide consists of one'or more castings and it is of the shape shownih Figs. lfto 6 inclusive. plained, this slide may be moved backward and forwardyon the bed to `elfect the length feeds of the tool. The said slide has end walls 59` 60 and? intermediate vertical front to rear partitions 61 62. The walls 59" and k61 serve to support the supports, sleeves or holsters for the tool spindles. Thenumber of these bolsters depends upon the number of tools or tool spindles-which may be found to be desirable or necessary for use in the machine,- and, although for general purposes I find that three are suflicient, never theless I may add to or detract from that or expediency may number as convenience dictate. I find that it is quite convenient to mount the holsters in the same horizontal plane, but Tof course it will be understood that the invention is not limited to'this `particular arrangement. In the ymachine illus` trated upon the drawings, the three holsters are indicated respectively at 63, 64Landy 65. Each bolster is heldl against rotation by a key which is located in a notch in the vwall 61, but each bolster may be moved longitudinally so as to advance the tool support ythereby into potential Working relation Ato the fwork. i After the bolster is advanced, it is necessary `that it should be. locked to n the carriage in order that it may move with the cailriage, and I have provided a convenient means for locking all ofthe holsters 'simultaneously as I will now explain. The

lwalls'q59 and'6lvare bored out or are so By mechanism which will be, eX-

' sters. A movement of the handle formed as to provide guideways which, as shown in Fig 30, are adapted for the reception of locking or clamping pins 66, 67

`and`68, as shown in Figs. 29 vand 30. Be-

tween the adjacent ends of the pins 66 and 67, which ends .arebeveledas shown, there `Figs.'29 and Q0. 72 (Fig. 30) indicates a pin in each of the walls 59and 61 which is held in place and which is'adjustable by a screw 73. The pins 66, 67, 68, 69, and 72 in the two walls 61 and 59 are duplicates and are arranged in thesame way, moving the two pins 70 71 in rections, their pointed ends will wedge the pins: 68 and 69 longitudinally so that the pins 68 will lock or clamp the bolster 65 against movement. `The pins 69, in being wedged downward, move the pins 66 and 67 in opposite directions ,so as to lock or clamp the holsters 63 and 64 against movement. ,The pins 7() and 71, as shown in Fig. 20, are supported byl the-walls 59 and 6l and by a bracket which is integral with the wall (i9 and the top of the tool slideframe. Between the ends of thepins 70 7lprojccts the pointed end olla pin 74 which is ar ranged transversely thereto and against the end of which abuts an adjusting screw 75. On the outer end of it;` may be rotated so as to Wedge the pin 74-i`nward to force the pins 70 and Y71 in so that they may` so that, byv opposite di.

this adjusting sci-,ew` 475, there is clamped a handle 76 by which ioo opposite directions with theresult which I have yalready explained. The handle 76 is -arianged on the front side of themachine, as shown in Fig. 2, so that it is accessible to the operator and may be.` actuated, by him without leaving his position in front of vthe machine. When the operator desires to unlock the` holsters so that" he may. advance orretract any one ofthe1n, thehandle is swung so as `to relieve the pressure upon the sliding pin 74 and thus release the bolin the op* posite direetion'forces thescrew inward so as to cause the sliding pin 74 to separate the sliding wedge pins() 7l and lock the bolsters. 1While this has proved to be a very good means for locking and unlocking the bolsters, nevertheless it can be varied as may be desired and other locking means'suh stituted therefor. It should be noted that the various sliding wedge pins fit loosely within their guideways or sockets and yet with sufficient tightness to cause them to operate satisfactorily.

`In order that thev various holsters may bey moved conveniently so as to place ltheir tools withproper relation to thework or to move them out of working position, I provide suitable lmanually-operatedv power-- transmitting mechanism as best illustrated in Figs. 3 and 7 Each one of the bolsters is provided with rack teeth 77 (as for instance as shown in- Fig. '31)' so that it may be 'engagedby a pinion. As illustrated in Fig. 7, I provide three shafts 78, 79 and 80 which are journaled in suitable bearings formed on the tool slide. .The shaft`78 is arranged horizontally but the shafts 79 and 80 are arranged at an inclination both to the vert-ical'and to the horizontal, although they are all preferably Iarranged in the same transverse vertical plane as shownin Figs. 2,-and 7. On the inner end of each shaft, there 'is a pinion, said pinions being indicated at 81,. 82 and 83, and engaging the rack teeth of the .bolsters'68, 64 and .G5 re- "spectively-v The. pinions are preferably of sufficient diameter so that one rotation thereof will advance thabolster to its maximum position. O n the said shafts are mounted handles 84, 85 and S6 by which the pinions may vbe rotated, and 'it will Vbe noted/that adjacent the handles are stops indicated at 87, 88 and 89 with which the handles will engage to limit the retractive movement of the bolster's, as, clearlyshown in Figs. 2 and 7. After the bolsters have beenv unlocked and are free to slide, any one of the handles B4, 85 or 86 may be 'rotated to advance its particular bolster to any desired position with reference to the Work.

.As in my, former-machina dles are extensible or telescopic, and a descriptionl ofV one of them will serve for a descriptionbf the whole. These spindles -are indicated as a whole at 90, 91 and 92,

93 in dotted lines in and upon their outer ends are mounted grinding tools having different characteristics asto dimensions shapes, abrading qualities, etc. Preferably the spindle 92v carries. the cup-shaped grindingtool as indicated at Fig. 1. This toolis ver-y convenient @for shoulder facing Vand s imilarrwork. disk grinding wheel 94: whichmay be used for internal grinding, whereas' the spindle 90 carries a large disk grinding wheell capable of which I have described are sufficientfor this' purpose.

Taking the extensible spindle 90` shown in Figi 31 as an example ofthe others,

it will lthe tool spin.-

The spindle 91 carries a small however, use tools of such character,V

. pulleyv be seen that it consists of two sections which telescope one into the other. The section cz has its inner end `hollow to receive the reduced end of the section b, there being splines 97 whichhold them in lrotative engagement. The section a is journaled in bearings l9,8 99 in the bolster 63.,.Suit'able collars, "which need not for holdingthe-bearings in place and for resisting the end thrustof the section-a of the spindle '90. On the conical end of the section a isI aiixed the hub 100 of the Agrinding Wheel 96, said hub being held in place by a nut 101. The sections b b bof the spindles 90, 91 and 92 project through bearings 102 in the wall 62' and are provided withfast and loose `belt pulleys as will be explained. The ends of the spindles 90 and' 92'are jour- 'naled in bearings 103 in the end Wall GO, but' the end of the spindle 91 is journaled in a .bearing 104 in a-weh '105 locatedbetween the walls 60 and 62, as shown in Fig. 5, this web, as shown in dotted lines in Fig. 1, be ing formed on the wall-62 as shown in plan View in Fig. 1, and in end elevation in Fig, 11. On each bf the three spindles 90, 91 and 92 are placed two pulleys ofA which oneisfast and one is loose.` On the spindle 90,*'the' fast pulleyl -is indicated at 106 and the loose at '107, and it will be seen that the loose pulley -is to thel right and is somewhat elongated, being substantially twice the length axially of the'vpulley 106. In Fig. 5, it will be seen that on the spindle 92 the fast pulley is indicatedl at 108 and the loose pui-. ley at 109', and that their positions are reversed `in this case from `what they` are on the Aspindle 90.

'Ihe spindle" 91 is, provided with a fast". pulley 110 and a loose pulley 111, which are located to the .left of the vertical transverse planes passing throughr the pulleys 106, 107, 108, and 109. In a horizontal plane below the plane of the vthree spindles, there is a shaft 112 which is journaled in suitable bearings in the Walls 60 62,and upon this shaft "are arranged in alternation afast pulley 113,

`aloose pulley 11,4, a fast pulley 115, and` a --loo'se "pulley 116.y These pulleys are arranged side by lside and they areplaced in certain relation to the spindle pulleys so that I accomplish certain results as will be expla-ined. The two outer spindles .90 and 92 are ,driven by a main belt indicated at 117, whereas the pulley for .the spindle '9L-is driven by a belt 118 from the pulley 113 on the shaft 112. Ars-illustrated in Fig. 11, the main driving belt 117" passes up over they be-described in detail, are utilized pulleys on the spindle 90, thence down under -the pulleys on the shaft 112, thence up over the pulleysA` on the shaft 92, and thence down i and a'rounda driving drum 119. The-drum. 119 .is elongated suiiciently so that, when the tool slide isreciprocated longitudinally,'the

belt 117 will not be disengaged therefrom..`

f .91,15 elle 

